Finding the Fourth Proportional to 12,693.99, 17,517.33 and 7,028.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.99 : 17,517.33 = 7,028.55 : x
2. Step 2: Convert to fraction form
   12,693.99/17,517.33 = 7,028.55/x
3. Step 3: Cross multiply
   12,693.99x = 17,517.33 × 7,028.55
4. Step 4: Simplify right side
   12,693.99x = 123,121,429.77
5. Step 5: Solve for x
   x = 123,121,429.77/12,693.99
6. Step 6: Final answer
   x = 9,699.19